Forgeable alloy of iron and nickel



Patented Jan. 15, 1924.

UNITED STATES PATENT OFFICE.

TRYGVE D. YENSEN;-OF SWISSYALE, PENNSYLVANIA, ASSIGNOB TO WESTINGHOUSEELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

FORGEABLE ALLOY O]? IRON AND NICKEL.

No Drawing.

To all whom it may concern:

Be it known that I, TRYGVE 1). YnNsn'N, a

citizen of the United States, and a resident of Swissvale, in'the countyof Allegheny 5 and State of Pennsylvania, have invented a new and usefulIm rovement in Forgeable" Alloys of Iron and ickel, of which thefollowing is .a specification.

My invention relates to alloys ofiron and be readily forgeable over awide range of temperatures.

It has been known for some time that pure 1 alloysof iron and nickel donot forge readily at ordinary forging temperatures and it is necessary,in order to make them forgeable,

- to add small amounts of some alloying element. Manganese has been usedfor .this

2 purpose to such extent that it has come to be regarded as a necessaryconstituent of nickel steels. Y

I- have'now found .that titanium can also be used to make iron-nickelalloys forgeable 26 and that this element serves the purpose even moreeffectively than manganese. In practising my invention, a suitableproportion of titanium is combined with the iron and nickel forming thealloy in .any manner desired, the proportion of titanium employeddepending upon the relative proportions of nickel and iron in the alloyand, to some extent, upon impurities which may be present in the -metalsemployed.

I have ascertained, however, that, by the addition of from 0.1 to 1%titanium, all

iron-nickel alloys are rendered forgeable at all temperatures from blackup to bright red heat, thatis at temperatures ranging from below 500 toover 900,C. a

While I do not wish to be. restricted to any alloyscontaining to 100%nickel and the remainder iron, an addition of titanium to the amount of2% of the iron content will Application filed April 18, 1919. Serial No.290,922.

insure satisfactory results.- In other words, the amount of titaniumemployed in any iron-nickel'alloy may comprise substantially 2% of thecontent of the lesser metal.

I have found that iron-nickel alloys contaming titanium are more readilyforged at ordlnary temperatures than corresponding alloys containingmanganese and that this is particularly true if the titanium is presentin substantially the proportions above specified. Of course, ifmanganese is present as an impurity, the amount of titanium added shouldbe less, and it is possiblethat the presence of certain other impuritiesmay also require a slight change in the proportion of titanium employed.For these reasons, I do not wish, in anyway, to limit my invention butintend, intlie appended claims, to cover it as broadly as the state ofthe art permits.

I claim as my invention:

1. A forgeable alloy comprising unequal quantities of iron and nickeland a relatively small amount of titanium, the amount of titaniumvarying in proportion to th amount of the lesser metal present.

I 2. A forgeable alloy comprising unequal quantities of iron- 'andnickel and a small amount of titanium, the amount of titanium beingsubstantially 2% ofthe amount of the lesser metal present. 3. Aforgeable alloy comprising iron, a lesser amount of nickel and arelatively small amount of titanium, the amount of titanium varying inproportion to the amount of nickel present.

4. A forgeable alloy comprising iron, a

lesser amount of nickel and titanium, the

TRYGVE D. YENSEN.

